Anyone with an interest in the D Day Landings should definitely visit the gun battery at Longues Sur Mer. The shear size of the casements and their guns suggest that they were untouchable. One gets the feeling that any shell coming out of their barrels would go a long way and do an awful lot of damage. Several attempts were made to put them out of action before they finally succumbed to naval bombardment on D Day. They could have made the successful D- Day Landings into a total disaster.